Congress is deeply divided over implementation of the Patient Protection and Affordable Care Act (ACA). Since the ACA's enactment, lawmakers opposed to specific provisions in the ACA, or to the entire law, have debated implementation of the law on numerous occasions and considered multiple bills to repeal, defund, delay, or otherwise amend the law. Topics discussed in this compilation include the legislative actions to repeal, defund, or delay the Affordable Care Act; health insurance exchanges under the patient protection and ACA; health insurance premium credits in the patient protection and ACA; physician supply; annual fees on health insurers; and medical loss ratio requirements under the patient protection and ACA.